Preparation and Catalytic Activity of Gold Nanoparticles Stabilized by Poly(N-Vinylpyrrolidone) and Deposited onto Aluminum Oxide

Yesmurzayeva Nurlykyz^, , Selenova Bagdat and Kudaibergenov Sarkyt

Cite this paper:
Yesmurzayeva Nurlykyz, Selenova Bagdat and Kudaibergenov Sarkyt. Preparation and Catalytic Activity of Gold Nanoparticles Stabilized by Poly(N-Vinylpyrrolidone) and Deposited onto Aluminum Oxide. American Journal of Nanomaterials. 2013; 1(1):1-4. doi: 10.12691/ajn-1-1-1

Abstract

Gold nanoparticles (AuNPs) stabilized by poly(N-vinylpyrrolidone) (PVP) were prepared by “one-pot” synthetic protocol and characterized by UV-Vis spectroscopy, DLS and TEM. According to DLS measurements the average size of AuNPs stabilized by PVP in aqueous solution is varied from 10 to 25nm. The PVP stabilized AuNPs (AuNPs-PVP) were deposited on the surface of aluminum oxide (Al2O3/AuNPs-PVP) and its catalytic activity was evaluated with respect to decomposition of hydrogen peroxide. It was found that the amount of AuNPs-PVP deposited onto Al2O3 is extremely low and in the range of 0.06-0.1%. TEM images reveal that the average size of AuNPs-PVP deposited on the surface of Al2O3 is equal to 10-30 nm. The rate of H2O2 decomposition in the presence of Al2O3/AuNPs-PVP exhibits induction period in dependence of the molecular weight of PVP and increases in the following order PVP-350•103 > PVP-40•103 > PVP-10•103.

Keywords:
gold nanoparticles poly(N-vinylpyrrolidone) stabilization deposition aluminium oxide catalysis

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